The following parameter shall be set for every current transformer connected to the IED:
Table 11: CT configuration
Parameter description Parameter name Range Default
Rated CT primary current in A CTPRIMn
n = channel number
from 0 to 99999 3000
This parameter defines the primary rated current of the CT. For two set of CTs with ratio 1000/1 and
1000/5 this parameter is set to the same value of 1000 for both CT inputs. The parameter CTStarPoint
can be used in order to reverse the direction of the CT. This might be necessary if two sets of CTs have
different neutral (WYE) point locations in relation to the protected busbar.
For main CTs with 2A rated secondary current, it is recommended to connect the secondary wiring to the
1A input.
Take the rated permissive overload values for the current inputs into consideration.
5.3 Supervision of input/output modules
M11728-2 v3
I/O modules configured with PCM600 (BIM, BOM or IOM) are supervised.
I/O modules that are not configured are not supervised.
Each logical I/O module has an error flag that indicates signal or module failure. The error flag is also set
when the physical I/O module of the correct type is not detected in the connected slot.
Section 5 1MRK 504 165-UUS Rev. J
Configuring the IED and changing settings
56 Transformer protection RET670
Commissioning manual
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